Air heater and ventilator



G. A. TUCK.

AIR HEATER AND VENT|LATOR..

APPLICATION FILED JULY 21.1921.

Patented Feb. 7, 1922.

4 SHEETS-SHEET Suva doc (i. fl-juok G. A. TUCK. AIR'HEATER AND VENTILATOR.

APPLICATION FILED JULY 2!.1921.

v 1,406,11 1, v Patented Feb. 7, 1922.

4 SHEETS-SHEET 2- G. A. TUCK AIR HEATER AND VENTILATOR.

APPLICATION'FILED JULY 21,1921.

Patented Feb. 7 1922.

4 SHEETS-SHEET 3.

" II/I G. A. TUCK.

AIR HEATER AND VENTILATOR.

APPLICATION FILED JULY 21, I921.

Patented Feb. 7, 1922.

4 SHhETSSH'EET 4.

PATENT OFFICE.

GEORGE ALBERT T'U'CIK, OF SAN FRANCISCO, CALIFORNIA.

AIR HEATER AND VENTILATOR.

' Application filed July 21, 1921.

To all whom it may concern .1

Be it known that I, GEORGE ALBERT TUoK,

a citizen of the United States, residing at.

San Francisco, in the county of San Franc 1sco and State of California,have invented certain new and useful Improvements in Air Heaters andVentilators; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to an improved heater and ventilator and oneobject of the invention is to provide an improved heater by means ofwhich air may be heated in a very efficient manner and the heated airpassed into a distributing pipe.

Another object of the invention is to provide a heater having animproved heat radiating sectlon positioned in a casing, the radiatorbeing so constructed that air may pass through the radiator and aroundthe same when passing from the air inlet to the air outlet of the heatercasing.

Another object of the invention is to provide an improved heater havingthe radiator structure mounted above the burner and so constructed thatthe products of combustion from the burner may pass through the radiatorto thoroughly heat the same and then pass out through the outlet neck ofa hood at the upper end of the radiator structure.

Another object of the invention is to pro-.

vide a heater so constructed that the air may be drawn into the upperend of the heater casing .by means of an electric fan and by this fanforced down throughand about theradiator and out through an outlet atthe base of the casing thus causing the air to leave the heater at thepoint of greatest heat.

Another object of the invention is to provide a radiator constructionformed of sections so connected that they may be easily put together andwhen to other have joints which will be air-tight an thus preventtheproducts of combustion from mixing with the air. 7

Another object of the invention is to provide a heater having a burnerrovided with a valve and operatlng means or opening the valve when theelectric fan which draws air into the heater is turned on.

Another object of the invention is to so Specification of LettersPatent.

Patented Feb. '7, 1922.

Serial No. 486,501.

construct the valve operating means that the means for impartingmoivement to the same to open the valve may consist of armspivotallymounted about a disk carried by the shaft of the fan and moved outwardlyby centrifugal force against the action of springs when the fan isturned on.

This invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a view showing the improved heater in vertical section.

Figure 2 is an enlarged vertical sectional view through one of theradiator sections and a portion of another.

Figure 3 is a view showing one of the radiator sections in top plan.

Figure 4 is a transverse sectional vie through the hood of the heater.

Figure 5 is a transverse sectional view through the lower portion of theheater.

Figure 6 is a vertical sectional View through an upper section of theheater.

' Figure 7 is a transverse sectional view through the heater sectionshown in Fig. 6. Figure 8 is an enlarged view showing the fan and valveoperating means carried thereby in side elevation.

Figure 9 is a vertical sectional view through the structure of Fig. 8looking'towards the motor of the fan.

Figure 10 is a vertical sectional view taken along the line 1010 of Fig.8 with the pivoted arms in a retracted position.

Figure 11 is a view similar to Fig. v1O showin the pivoted arms extendedby centrifuga force.

. Figure 12 is a perspective view of one of the pivoted arms.

This improved heater is rovided with a casing l which is positionevertically and is provided with an inlet 2 at its upper end throughwhich air may enter thecasing 1 and with an outlet 3 adjacent its lowerend through which air may pass out of the casing. The base 4 of thiscasing 1 carries a .gas burner 5 which is supplied with gas by means ofa pipe 6 controlled through. the medium of a valve 7 which is normallyclosed and will be opened by having its valve stem drawn upwardlythrough the medium of a rod 8 which extends upwardly through the outlet3 and into the inlet 2. A pilot burner 9 15 provided in o rativerelation to the burner 5 so that w on the valve 7 is opened and the gasflows through the pi e 6 to the burner 5 the gas will be ignite The airheater is provided with a supporting base 10 which is positioned in thecasing 1 above the burner 5 and is provided with an air inlet 11 so thatthe proper amount of air may be supplied for good combustion and tocreate the proper draft. This supporting base 10 is tubular and is openat its lower end and at its upper end is provided with. a cross bar 12which extends across the open upper end of the base and thus providesspaced outlets through which the products of combustion will pass.

The radiator which is positioned between the base 10 and hood 13 isprovided with upper and lower sections 14 and 15 which are ofsubstantially a duplicate construction and intermediate sections 16which will have a duplicate construction and any number of which may beprovided according to the size of the heater to be constructed. Rods 17extend from the base 10 up through the sections which form the radiatorand have their upper end portions extending above the hood 13 to carry acast iron ring 18 upon which a fan 19 is mounted. Each of the sections14 and 15 is provided with an outer circular wall 20'and an innercircular wall 21 thus providing space between the two walls as shown inFig. 7. The central passage 22 within the wall or sleeve 21 is closed atone end and passageways 23 lead from the sleeve 21 through the outerwall or sleeve 20 thus providing transversely extending passages withwhich the central passage 22 communicates. From an inspection of Fig. 7it will be further .noted that passages 24 for products of combustionare provided u on opposite sides of the transversely exten ing airpassage so that the products of combustion may pass from the tubularbase or support 10 through these passages 24 into the intermediatesections of the radiator and after passing through the intermediatesections of the radiator, the products of combustion may pass throughthe passages 24v of the u per section 14 into the hood 13 through wlilchthey will pass over the bafile 25 and out through the outlet passageways26 into a pipe 27 which communicates with the chimney 28. 1

Each. of the intermediate radiator sections 16 is provided with an innersleeve or 'wall 29 and, an outer sleeve or wall 30 which is held inspaced relation about' the inner sleeve by spacing bars 31. Inaddition-to I ,holding the sleeves 29 and 30 in spaced relation, therods 31 serve as heat conductors since they will be thoroughly heated bythe productsof combustion passingbetween the sleeves v and this heatWlll bepassed to the vv, slee ves ,and' v fins 32 carried .by the; outersleeve. The inner sleeves or walls29 provide a passage leading from thecentral passage 22'of the upper section 14 to the central passage 22 ofthe lower section 15 and the space between the walls 29 and 30 providesan annular passage communicating at its upper end with the passages 24of the upper section 14 and at its lower end with the passages 24 of thelower section 15. It will thus be seen that air entering the casing 1through the inlet 2 at the upper end of the casing may pass down throughthis casing and out through the outlet 3, a portion of the air whilepassing downwardly passing into the passageways 23 of the upper section14 of the radiator and then passing downwardly through the intermediateradiator sections 16 and out through the passageways 23 of the lowersection 15. The air will thus be heated both 86 by contact with thewalls of the central passage and by contact with the outer walls of theradiator and fins 32 carried thereby. In order to prevent the productsof'combustion from escaping while passing from 90 the base 10 to thehood 13, the sections 14, 15 and 16 have been provided with'annular ribsor rings which'fit in overlapping relation as shown in Figs. 1 and 2when the sections are put together. It will thus be seen that whencement is applied to the ends of the sections 14, 15 and 16 and thesesections placed one upon the other, air-tight joints will be formedbetween the sections and the products of combustion will be preventedfrom leaking through the joints of the sections and mixing with the airin the casing.

In order to open the valve 7 when the fan is turned on, there has beenprovided means operated from the fan and specifically illustrated inFigs. 8 to 11. Referring to these figures, it Will. be seen that theupper end portion of the rod 8 extends above the fan shaft 33 and hasits upper end passing through a guide 34 carried by aplate 35 which isconnected with the fan housing by bolts or rods 36. A cross arm or plate3.7 is provided intermediate the fan shaft 33 and guide 34 and isprovided with .upper and 116 lower abutment flanges 38 and 39 which arearcuate as shown in Fig. 9. Leaf springs 40 are positioned as shown inthis figure and have their outer ends seated in notches formed in theblock 41 carried at the outer 120 ends of the side arms 42of'the plate35. The inner ends of the leaf springs 40 are seated in notches fomnedin a socket block 41' carried by the rod'8 abovethe upper flange .8 andit will thus be seen that'thes'e springs 1'25 tend, to assist in the roding-an.

adjusted position; valve which; as I previously s of afcom'entionalconstruction, is normally held in a closed position and in order'to movethe valveto an open position, it is necessary to draw the rod 8 upwardlyagainst the action of spring means holding the valve closed. It isfurther desired to have the valve move to an open position when the fan.is turned on and in order to do so, there has been pro.

' the hub 44 of the fan by rods 45 so that when the fan is rotating, thedisk 43 will also rotate. Arms are pivotally connected with the disk 43and each is provided with an inner section 46, an intermediate section47, and an outer section 48. The inner section 46 is pivotally comiectedwith the disk .43 and provided with a side lug 49 which is engaged by aspring 50 so that normally, the arms will be retained in the positionshown in Fig. 10 with the free end portion of the intermediate sectionof an arm extending in overlapping relation to the inner section of anadjoimng arm. It will be further noted that when in this position, thecurved end faces 51 of the outer sections 48 will engage the upper faceof the flange 39 and thus the flange 38 extends across the outer edgefaces of the intermediate and outer.

sections 47 and 48. When the fan is turned on, the centrifugal forceexerted, will cause the arms to swing outwardly to the position shown inFig-11 and as the arms swlng outwardly, the outer edge faces of thesections 47 .and 48 will engage the underfaee of the outstanding flange38 and will thus tend to move the rod 8 upwardly to open the valve 7.The gas will flow through the ipe 6 and be ignited by the pilot 9 and te air which is driven downwardly through the casing will be heated aspreviously ex lained and pass out through the outlet 3. W en the rod 8is moved upwardly, the springs 40 are carried upwardly with it and willassist in retaining the rod in a raised position. When the fan is turnedoff the springs 50 will tend to return the arms to the position of Fig.10 and the rod will be moved downwardly as the valve closes. It willthusbe seen that with this construction, the shaft will be imtomaticallyturned on when the fan is turned upper end and moves downwardly aroundand through the'heater and then passes out at the lower end of thecasing the air will be heated to a greater extent as it moves toward theoutlet and will leave the casing at the point of greatest heat. It willbe further noted that if desired, the gas of the pilot can be shut oiland the gas for the burner 5 shutoff either by means of the valve 52 orby means of a separate valve placed in the gas-line in advance of thevalve 7. The device can thus be used as a ventilator for supplying freshair or cooled air from a suitable source of cool air and this fresh airpassed through the casing and through the outlet 3 into the pipe whichis to distribute the fresh air or hot air through a building. By havingthe casing provided with a removable cover 53, the cover can be removedand easy access had to the fan for 30 making repairs. There has thusbeen pro vided a device for use in suppl hot or fresh air to a buildingand there as fur-v ther been provided a device in which the air can beheated in a very effective manner and further the burner provided with aflow of gas which will be increased accordingly, to the speed at whichthe fan rotates. Therefore', the airwill always be heated at the righttemperature and without danger of waste of gas.

I claim:

1. A heater comprising a casing having an air inlet and an air outlet, aburner in the casing, a heater in said casing and hav-* ing a. hollowbase above the burner, a hood in the upper portion of the casing havingan outlet extending through said casing, and a radiator element betweenthe base and hood and having superimposed sections ha-v- 100 ing innerand outer sleeves forming a central air passage and :1. products of.combustion passage about the air passage and between the sleeves, theproducts of' combustion passage having communication with the 105 baseand hood and the air passage being closed at its ends and adjacent theends having necks extending through the outer sleeve.

2. A heater comprisin a casing having an 110 air inlet and an air outet, a source of heat in the casing, a radiator in the casin hav-" ing ahollow base above the source 0 heat, a hood in the casing having anoutlet extending through the casing, and an intermediate section betweenthe base and hood having a central air passage and a products ofcombustion passage about the air passage, the products of combustionpassage having communication with the base and hood and the air passagebeing closed at its ends and having passageways extending through theproducts of combustion passage and communicating with the interior ofthe casin 3. In a-heater, a heat absorbing'and rad1-' ating structurecomprising a hollow open ended base, a hood having an outlet, and astructure between said hood and base having an outer sleeve and an innersleeve ex-. tending through the outer sleeve and forming a centralpassage and. a passage between the inner and outer sleeves, the innersleeve being closed at its ends and adjacent the ends being providedwith passageways forming side plpes extending from the central passagethrough the outer sleeves. 4. heater comprisin acasing having an airinlet and an air out et, a source of heat in the casing, a heatermounted in said casing and having a hollow base above the source ofheat, a hood in the upper portion of said casing having anoutletexte'nding through the casing, and a radiator element between thebase and hood and having intermediate' and end sections each having saced inner and outer sleeves to provide. an air conduit of the innersleeve and a products of. combustion passage between'the inner and outersleeves, the end sections having the inner sleeves closed at theirouter'ends and provided with neck extensions extendin through the sidesof the'outer sleeves and communicating with the interior of the casng.

'5. The structure of claim 4 having the contacting ends of the radiatorsections provided with annular ribs overlapping when the sections areplaced one upon another and providing air-tight joints when the sectionsare cemented together. I

6. A heater comprising a casing having an air inlet and an air outlet, aburner in the casing, a tubular sup rt abo e said burner open at itsupper an lower ends and provided with an air inlet extending through thecasing, a heater resting upon said support and having a lower sectionrovided with a transverse air passage an a central passage extendingvertically from the transverse passage through the upper end of thelower section and about the vertical passage provided with products ofcombustion passages communicating with the interior of sa d, support,intermediatesections sup rted by the lower section and each having acentral air passage and a circumferentially extending products ofcombustion passage about the air passage, an upper section provided witha ocket "registering with the air passage an passages about the pocketregistering with the products of combustion passages, and further havingtransverse passages leading from 'the pocket through the sides of theupper section, and a hood u on the upper section having an outlet leaing from one side and a baffle plate vertically and across the outlet'7. A heater comprising a casin having an air inlet adjacent its upperend air outlet adjacent its lower end, a burner in the casing below theair' outlet, and a heater in the casing, said heater comprising atubular open ended base mounted above the burner having an air inletextending central air and an from-its lower end through the casing, a

radiator disposed vertically in said casing and having upper and lowersections and intermediate sections between the u per and lower sections,and a hood carrie by the upper section and having an outlet for productsof combustion passing through the casing, the intermediate sections eachhaving spaced inner and outer sleeves providing a central air passageand an annular passage between the sleeves for products of combustionand the upper and lower sections each having a transverse air passageand a vertical air passage leadin from the trans verse passage andcommunicating with the assage of an adjoining intermediate sectlon andfurther provided with vertical products of combustion passages about thecentral air passage for conducting products of combustion from the baseinto' the passage between the sleeves of the intermediate sections andinto said hood.

8. A heater comprising a casing having an air inlet an an air outlet, asource of heat in said casing, a heat absorbing and radiating element, asupply for the source of heat including a control element, a rotary fanfor moving'air through said casing, and means actuated from the fan whenthe fan is in motion for actuating said control element and increasingand decreasing the amount of heat according to the speed 'at which thefan rotates.

9. Thefstructure of claim 8 having the means for actuating the controlelement ineluding an element carried by the fan and moved by centrifugalforce created when the fan isin motion.

10. A heater comprising a casing having an air inlet 'andan air outlet,a fluid burner in said casing, a heat absorbing and radiating element insaid casing, a fuel conductor pipe for said burner having a controlvalve, a rotary fan for movingair. through the casing, and meansoperated from the fan for opening the valve when the fan is in. motion.

11. A heater comprising a casing having an air inlet and an air outlet,a fluid burner in said casing, a heat conducting and radiating elementin said casing above said burner,

a fuel pipe leading to sa1d burner and having a normally closed valveprovided with a stem movable to open the valve, a rod extending upwardlyfrom the stem of the valve, a rotary fan at the air inlet of saidcasing, and means actuated by said fan for moving the rod to open thevalve when the fan is turned on.

12. The structure of claim 10 havin the rod moving means moved by centriugal force set up when the fan-is rotating and the rod moved to open thevalve according to the speed at which the fan rotates.

13. A heater comprising a casing having an upper air inlet and a lowerair outlet, a burner in said casing, a heat conducting and radiatingelement in said casing above said burner, a pipe leading to said burnerand having a normally closed valve provided with a stem moved to openthe valve, a rod extending upwardly from the stem of the valve adjacentsaid casing, a rotary fan at the air inlet of said casing, spaced abutments carried by said rod, a disk carried by the shaft of said. fan,arms pivotally connected with said disk and extending between theabutments of said rod, and springs yieldably retaining the arms in aretracted position, the arms being thrown outwardly by centrifugal forceand engaging one of the abutments to move the rod upwardly and open thevalve when the fan is rotating.

14. A heater comprising a casing having an upper air inlet and a lowerair outlet, a gas burner in said casing below the air outlet, a heatconducting and radiating element in said casing above said burner, a gaspipe leading to said burner and having a normally closed valve providedwith a stem moved upwardly to open the valve, a rod extending upwardlyfrom the stem of the valve adjacent said casing, a rotary fan at the airinlet of said casing, upper and lower abutments carried by said rod, adisk carried by the shaft of said fan, arms pivotally connected withsaid disk and extending between the abutments of said rod, each armhaving an inner section pivoted to the disk, an intermediate sectionextending transversely from the inner section and each having its freeend portion overlapping the inner section of an adjoining arm when thearms are in a retracted position, and an outer section upon theintermediate section and terminating short of the free end thereof forengaging the lower abutment when the arms are in a retracted position,and

springs connected with the disk and inner sections of the arms toyieldably retain the arms in a retracted position, the arms being thrownoutwardly against the action of the springs by centrifugal force andengaging the upper abutment to move the rod upwardly and open the valvewhen the fan is rotating.

15. In a heater, a casing having an inlet and an outlet, a rotary fanfor passing air through the casing, a source of heat, a supply controlelement having an operating element extending to a point adjacent thefan and having spaced abutment elements, a disk carried by the shaft ofthe rotary fan, arms pivotally connected with the disk and extendingbetween said abutments and springs yieldably holding the arms in aretracted position, the arms being thrown outwardly by centrifugal forceand engaging one of the abutments to move the operating element'when thefan is rotating.

16. In a heater, a casing having an inlet and an outlet, a rotary fanfor passing air through the casing, a source of heat, a supply controlelement having an operating element extending to a point adjacent thefan and having spaced abutment elements, a disk carried by the shaft ofthe rotary fan, arms pivotally connected with the disk and extendingbetween said abutments, each arm having an inner section pivoted to thedisk, an intermediate section extending trans versely from the innersection and each having its free end portion overlapping the inhersection of an adjoining arm when the arms are in a retracted position,and an outer section upon the intermediate section and terminating shortof the free end thereof for engaging the lower abutment when the armsare in a retracted position, and springs connected with the disk andinner sections of the arms to yieldably retain the arms in a retractedposition, the arms being thrown outwardly against the action of thesprings by centrlfugal force and engaging the upper abutment to move therod -upwardly and open the valve when the fan is rotating.

In testimony whereof I have hereunto set my hand.

GEORGE ALBERT TUCK.

